Model Railroad Scale List

The purpose of this list is to offer
a potential entry into the hobby all the information on gauge and scale he/she
could possibly want. This list is always developing, so do not take it as
the gospel truth. I need your input to make it more complete and accurate.

This attempts to represent
model railroads, scale and collectible. I've tried to include only
manufacturers who produce a reasonable product line to keep the list
manageable. Theoretical Gauge shows the exact model gauge that corresponds
to the prototype gauge being modeled. This is only meaningful for US models
since they are (usually) modeled on specific gauges, unlike NEM specifications.
It is organized by scale name, then gives all the different defined
ratios for it, and then gives specs on each gauge used in the scale. I've
tried to base this info on NMRA and NEM definitions first while including
other national and corporate definitions.